Envco – Environmental Equipment

How TDR sensors work is similar to radar. A high frequency signal is pulsed down the probe. The reflection of this signal is proportional to the dielectric constant of the soil surrounding the sensor. The dielectric reading from the sensor is then converted to water saturation and transmits to the monitoring equipment via a 4-20mA signal.

Global Water's AT210 Soil Moisture Sensor provides reliable and accurate soil moisture monitoring for applications including:

• Bioremediation
• Wastewater Reclamation
• Landfill Management
• Agriculture

Water is the primary factor in determining the dielectic constant of soil. Global Water's Soil Moisture sensor measures the dielectric constant of the soil, which is directly related to the water content of the soil.

When installed vertically, the moisture sensor can be used to average moisture readings along a soil column. When installed horizontally, the sensor can be used to measure moisture at a specific soil depth.

The Soil Moisture Sensor has a high level output signal for direct interface to a variety of control, datalogging, and telemetry systems.

Soil Moisture Sensor Specifications
Range: 0-100% saturation
Accuracy: +2%
Power Requirements: 12 VDC ± 20% @ 40 mA
Output: 4-20mA
Weight: 2.5lbs (1.1kg)
Dimensions: 3/4" diameter x 30-1/2" long

Ordering Information
AT210 Soil Moisture Sensor